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Radioactive decay (also known as nuclear decay or radioactivity) is the process by which the nucleus of an unstable atom loses energy by emitting radiation, including alpha particles, beta particles, gamma rays, and conversion electrons. A material that spontaneously emits such radiation is considered radioactive.

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This is the Canadian version of How It's Made, for fireworks. Hands Fireworks from Ontario is the company that is featured in the video. What is mostly made in this video is a 4" Charcoal Comet Shell. At the beginning of the video and the end, the display takes place at L'International Des Feux Loto-Quebec in Montreal.

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Surely you've seen videos of so-called UFOs. For some this is proof of alien life, while others aren't so sure. So for World UFO Day 2013, Anthony lays out all the evidence, runs the numbers, and asks... do aliens really exist? Read More: World UFO Day http://www.worldufoday.com/ Take a look around and find information about everything UFO.

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Some 20 years ago, the most serious accident in nuclear history changed the lives of many. Massive amounts of radioactive materials were released into the environment resulting in a radioactive cloud that spread over much of Europe.

The greatest contamination occurred around the reactor in areas that are now part of Belarus, Russia, and Ukraine.

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nuclear and radiation accidents and incidents

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Medical cannabis, or medical marijuana, can refer to the use of cannabis and its cannabinoids to treat disease or improve symptoms; however, there is no single agreed upon definition.The use of cannabis as a medicine has not been rigorously scientifically tested, often due to production restrictions and other governmental regulations. There is limited evidence suggesting cannabis can be used to reduce nausea and vomiting during chemotherapy, to improve appetite in people with HIV/AIDS, and to treat chronic pain and muscle spasms. Its use for other medical applications, however, is insufficient for conclusions about safety or efficacy.

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Top 10 Health Benefits of Marijuana In 2737 BC It has been described that during that period, the first direct reference was found in China in the writings of the Chinese Emperor Shen Nung. The first use of cannabis product was used for psychoactive agents.

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The video below explains black holes . Black holes are formed when the core of a star collapses due to not being stable, the video explains this in a lot more detail and also explains any other questions about black holes

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Black Holes Explained – From Birth to Death

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Fireworks are a class of low explosive pyrotechnic devices used for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display (also called a fireworks show or pyrotechnics), a display of the effects produced by firework devices.

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They're the biggest- and loudest- part of America's Independence Day celebrations: Fireworks! Anthony shows us how where they came from and what makes 'em go "BOOM!"

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To use a standard solution of sodium hydroxide to distinguish between 2 samples of hydrochloric acid of different concentrations

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To use a standard solution of sodium hydroxide to distinguish between 2 samples of hydrochloric acid of different concentrations

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¨When an Acid and a Base react salt and water are formed.

¨This is called a neutralisation reaction.

¨ The average titration figure is then used to standardise (determine the precise concentration of) the Hydrochloric Acid solution.
Equation for reaction:¨HCl + NaOHa->NaCl + H2O
Apparatus:¨Retort stand

¨White tile

¨Burette

¨Pipette

¨Pipette filler

¨Funnel

¨Wash Bottle

¨Conical flask

¨3 Beakers

¨Dropper
Chemicals:
¨NaOH (Concentration: 0.1 M)

¨HCl solution A (Concentration: Unknown)

¨HCl solution B (Concentration: Unknown)

¨Phenolphthalein Indicator

¨Deionised Water
Procedure:1.Set up apparatus as shown.

2.Add a few drops of phenolphthalein indicator to the NaOH in the conical flask. (Note colour)

3.Allow the HCl to flow from the burette into the NaOH in the conical flask.

4.Add the HCl drop by drop until the solution in the conical flask changes colour. (Note colour)

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Balancing Chemical Equations - Chemistry Tutorial

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To measure the rate of oxygen gas production

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To measure the rate of oxygen gas production

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1)Hydrogen Peroxide naturally breaks down to produce Oxygen and Water.

2)Manganese dioxide acts as a catalyst for this reaction to speed up the breakdown of the Hydrogen Peroxide.
(a catalyst speeds up a reaction without it being used up)

Reaction:2H2O2 -> 2H2O + O2
Chemicals:•Hydrogen Peroxide•Manganese DioxideProcedure:1.Set up apparatus as shown.

2.Note the reading on the inverted graduated cylinder.

3.Add MnO2 to the H2O2 and start the stopclock.

4.Note and record the reading on the inverted graduated cylinder every minute.

5.Plot results on graph with time in minutes on the x axis and volume in cm3 on the Y axis.
Apparatus:
Buchner Flask

•Spatula

•Rubber tubing

•Rubber stopper

•Water Basin

•Retort Stand

•Graduated Cylinder
Results:1=10, 2=20,3=28,4=35,5=41,6=46,7=53,8=58,9=65,10=72,11=78,12=85,13=92,14=101,15=101

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any of a class of organic compounds that are fatty acids or their derivatives and are insoluble in water but soluble in organic solvents. They include many natural oils, waxes, and steroids.

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Does Oil Freeze - "I have always wondered"

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Does Oil Freeze - "I have always wondered"

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Since oil is a lipid, it does not freeze in the typical way freezing usually occurs, according to scientists at the University of Illinois. Lipids do not freeze, but the molecular movement slows down at colder temperatures.

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Will olive oil freeze? We test it using liquid nitrogen. Will it Freeze olive oil liquid nitrogen Ice melting cool science tricks experiments 'science experiments' projects 'school science project'

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Mach 1 = 1234.8 km/h

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Please Subscribe! http://testu.be/1HV4rBv Check out more TestTube 101: http://testu.be/1fu2C5s The rocket-powered X-15 flies at an astounding 4,520 miles per hour. That's MACH 6.04 or 6 times over the speed of sound! Crazy!

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the ratio of the speed of a body to the speed of sound in the surrounding medium. It is often used with a numeral (as Mach 1, Mach 2, etc.) to indicate the speed of sound, twice the speed of sound, etc.

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F18 Superhornet doing a high speed fly-by at .9 mach. I got a good view of the vapor coming off the jet. This was at the October 2011 Wings Over Houston airshow.